Game about searching correct victims and shooting them with sniper rifle in the rainy city park. After shoot the first victim you get a description of the next victim (and so on). If you shoot wrong guy you'll fail. This is a good challenge for hardcore gamers :)
Controls:
Mouse - look
Mouse wheel - zoom
Left click - shoot
It is recommended to play fullscreen.
Yes, there is no walking.

The mouse cursor doesn't seem to be grabbed properly in the standalone Linux version, only allowing half of the park to be targetable.
If you're keen to fix it, Screen.lockCursor() is probably a good direction to look towards :)
Thanks for providing a Linux build! :D